On Wed, Jun 30, 2010 at 10:49 PM, S R I M A N . M <miryala.sriman@xxxxxxxxx> wrote:
You can use the function pointers for this.for example: if module A has the function need to called by B. Insert the module A first and declare the extern for these functions in module B. To solve the problem of calling module B functions from Module A we can use the function pointers as explained below.
write a function in the module A which has the code to update function pointers (these are pointers to module B functions called by module A) given by module B later. Call the A's update function pointers function with the array of functions of B so that the module A will have the pointers to function in B and can call them in runtime.either way you can do it. functions in second inserted module has to be updated to the first inserted module so that the first inserted module can call them.Hope this is clear.Thanks,Sriman--On Thu, Jul 1, 2010 at 9:55 AM, Mulyadi Santosa <mulyadi.santosa@xxxxxxxxx> wrote:
On Wed, Jun 30, 2010 at 15:34, devendra dev <devendra.aaru@xxxxxxxxxxx> wrote:
> hi to all
> this is dev
> i had a module called module1 which calls the function which is exported by
> another module called module2 and the module2 calls a function which is
> exported by module1. When i perform insmod module1.ko and insmod module2.ko
> those are saying error:unknown symbol in module. do any one know answer pls
> suggest
> thanks
> dev.
So A depends on B and vice versa? wonder how modprobe and depmod will
act on that situation...
but anyway, have you declare the function name in each module as
"extern"? such as it originates in A, and in B you name "extern
blahblah"?
--
regards,
Mulyadi Santosa
Freelance Linux trainer and consultant
blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com
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